Question

Is this correct...please explain?

Answer 1

A = 10?

Answer 2

we're given a point on the function (2,\(\frac{5}{4}\))
we can plug it in to the formula \(f(x)=\large \frac{a}{x^3}\)
\(\large \frac{5}{4}=\large \frac{a}{2^3}\)

Answer 3

= 5/4 and a/8 ... 4a = 40 and a = 10? Cross multiplying

Answer 4

yeah. personally I 'd multiply both sides by 8.
\(\huge \cancel{8}2\frac{5}{\cancel{4}1}=a\)
\(\huge 2*5=a=10\)

Answer 5

that looks ugly, hmm